GB1573224A - Tuning circuits for communications receivers - Google Patents
Tuning circuits for communications receivers Download PDFInfo
- Publication number
- GB1573224A GB1573224A GB207377A GB207377A GB1573224A GB 1573224 A GB1573224 A GB 1573224A GB 207377 A GB207377 A GB 207377A GB 207377 A GB207377 A GB 207377A GB 1573224 A GB1573224 A GB 1573224A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- frequency
- output
- oscillator
- tuning circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 230000010355 oscillation Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 10
- 230000004044 response Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 229910002056 binary alloy Inorganic materials 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 2
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
- H03J5/0245—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form
- H03J5/0272—Discontinuous tuning using an electrical variable impedance element, e.g. a voltage variable reactive diode, in which no corresponding analogue value either exists or is preset, i.e. the tuning information is only available in a digital form the digital values being used to preset a counter or a frequency divider in a phase locked loop, e.g. frequency synthesizer
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/181—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a numerical count result being used for locking the loop, the counter counting during fixed time intervals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Superheterodyne Receivers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762606230 DE2606230C3 (de) | 1976-02-17 | 1976-02-17 | Abstimmschaltung für Überlagerungsempfänger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1573224A true GB1573224A (en) | 1980-08-20 |
Family
ID=5970070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB207377A Expired GB1573224A (en) | 1976-02-17 | 1977-01-19 | Tuning circuits for communications receivers |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JPS52100807A (enrdf_load_html_response) |
| DE (1) | DE2606230C3 (enrdf_load_html_response) |
| FR (1) | FR2341982A1 (enrdf_load_html_response) |
| GB (1) | GB1573224A (enrdf_load_html_response) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2912710C3 (de) * | 1979-03-30 | 1982-02-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Abstimmschaltung für einen Empfänger, deren Abstimmlage von dem Stand eines Zählers bestimmt wird |
| JPS63123079U (enrdf_load_html_response) * | 1987-02-04 | 1988-08-10 | ||
| JP2541224B2 (ja) * | 1987-06-15 | 1996-10-09 | ソニー株式会社 | シンセサイザ受信機 |
| JPS645350U (enrdf_load_html_response) * | 1987-06-30 | 1989-01-12 | ||
| JPH01135684U (enrdf_load_html_response) * | 1988-03-11 | 1989-09-18 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2362116C3 (de) * | 1973-12-14 | 1980-01-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Auf einstellbare Frequenzwerte rastbarer Steuergenerator |
-
1976
- 1976-02-17 DE DE19762606230 patent/DE2606230C3/de not_active Expired
-
1977
- 1977-01-19 GB GB207377A patent/GB1573224A/en not_active Expired
- 1977-02-15 JP JP1544977A patent/JPS52100807A/ja active Pending
- 1977-02-17 FR FR7704604A patent/FR2341982A1/fr active Granted
-
1978
- 1978-09-12 JP JP11213478A patent/JPS6019169B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6019169B2 (ja) | 1985-05-15 |
| JPS5463601A (en) | 1979-05-22 |
| DE2606230C3 (de) | 1980-03-27 |
| DE2606230B2 (de) | 1979-07-26 |
| JPS52100807A (en) | 1977-08-24 |
| FR2341982B1 (enrdf_load_html_response) | 1982-07-30 |
| DE2606230A1 (de) | 1977-08-18 |
| FR2341982A1 (fr) | 1977-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940119 |